Skin, ArtificialPsoriasisSkinDermatologic AgentsSkin DiseasesArthritis, PsoriaticPUVA TherapyUltraviolet TherapySkin NeoplasmsSkin AgingCoal TarSkin Physiological PhenomenaHLA-C AntigensAcitretinKeratolytic AgentsAnthralinEpidermisSkin TestsSkin AbsorptionKeratinocytesSkin PigmentationDermatologyClobetasolNail DiseasesDermatitisPhototherapyAdministration, TopicalSeverity of Illness IndexScalp DermatosesInterleukin-23Dermatitis, Atopic